1. Make an 8 mm transverse incision on the buccal mucosa in the oral cavity opposite to the fixed point selected before operation.

2. Separate the small incision with a small arc hemostatic forceps to expose the buccal muscle fibers.

3. First clamp the buccal muscle fibers in the incision with Alice pliers (pay attention to whether the facial muscles twitch when clamping, so as not to damage the facial nerve fibers), and then cut the clamped muscle fibers with bending scissors.

4. Sew the buccal mucosa in the oral cavity and the subcutaneous dermis at the fixed point of the cheek with a thin curved needle.